This framework is based on our experience of around 140 studies reviewing public sector programmes since 2010. The main NAO reports are available on our Managing major projects web-page, including good practice guides such as Initiating successful projects. Key aspects are detailed in the Appendix to this document.
We have revised the guide to reflect our work up to February 2019. The previous edition, including evidence from reports up to 2017, is available here. This is an evolving framework and we expect to add to and amend it as further evidence becomes available.